Answer:
34°
Step-by-step explanation:
Angles on a straight line add up to 180°.
Therefore, we equate the sum of all angles along the straight line to 180° to solve x:
[tex]x\textdegree+(x+12)\textdegree+100\textdegree=180\textdegree\\\\2x\textdegree=(180-100-12)\textdegree\\\\2x=68\textdegree\\\\x=34\textdegree[/tex]
Hence x is 34°
